详情
sell 3 7/8"(*8mm) to *7 1/2"(**5mm) tricone rock bit with good
quality and service.
1.journal bearing. hard faced head bearing surface.cone bearing
inlaid with friction reducing alloy and then silver plated.the load
capacity and seizure resistance of the bearing is greatly
improved.
2.o-ring seal is made of the more wear resistance high saturated
buna-N with the section and precisely designed sealing flange in
the cone sealing area increased the reliability of the seal.
3.the bit bearing is ball which can be applied to high rotary speed
drilling.
4.all rubber compensatory is used which can provides the bearing
system with good assurance of lubrication.
5. new type of grease that can sustain high temperature up to **0 C
is utilized.
6.high wear resistance and excellent cutting ability of the insert
bit are given full play by using carbide compacts of high strength
and high toughness in combination with optimized compact numbers
and rows,the exposure height and special shaped compacts.
type:**7,**7,**7,**7,**7,**7,...........
